Process trimmer



July 10, 1928. I 1,676,574

G. A. OSTERMEIER PROCESS TRIMMER Filed March 14, 1927 gwwmtw George Oaicrrnaw.

- heal.

Patented M 10, 1928.

I UNITED era, are

GEORGE A. psmmmm, or ennon, Wisconsin,

" i noonss TRIMMER;

Application filedlviaroh 14, 1927. Serial "no.'1" '5,357.

This invention relates to improvements in dental surgical tools, having for an object to provide; an instrument particularly advan tageous for use inthe removal of superfluous bony'structure, especially, the anterior plate of the superior maxilla andfor the effectual trimming of irregular or sharp.

portions of process of upper and lower alveolar ridge subsequently to or during the extraction of teeth, whereby to afford greater comfort to a patient and to facilitate rapid healing aswell as efiecting a better, foundationfor artificial teeth, according the same greater strength and durability and better expression.

It is aloan equally important object of the invention to 'providea'n instrument of the character nentioned having the blades thereof so arranged and formed that a clear and unobstructed view may be hadof the operatffield, hence, facilitating an "accurate operationtogether Withthe leaving of the edges of process or similar matter cut thereby more obtuse, Where nature will rapidly The invention may be stated to alsofi'nclude amongst its principal desideratuins, the provision of a dental instrument which,because the peculiar foiinat'ion o f the blades'there of may be advantageously employedas an aid in removal of the [roots of teeth oras a means for effectually[removing g'um tissue fronrover erupting. third molars and similar conditions, likewiseto remove gold caps and crowns with but minimum stressing. Qth erfobjects ofythe invention 'Will be in part obvious and in part pointedout hereinafte'r. i

1 11 Operation may bereadily understood those skilled in the art, I have in the accompany-- ing illustrativedrawings and in the detailed following description basedthereupon, set out one possible embodiment of my inven In thesedrawing's:

Having more particular reference to the drawings, in connection with hich like characters of reference will designatecorresponding parts throughout, the improved'instrument may be stated to, comprise shafts 1 and 2 fornnad of a suitable grade of tool steel or other approved material having oppositely curved handle portions 3 andA; certain of the ends of said shafts being adapted to be pivotally interconnected by order that the invention and its i'hode of themselves the forming of an enlarged and slotted portion 5 in one thereof, While the reduced and substantially flattened portion 6' is fornied upon the opposite shaft and is passed through the slot of-the enlarged portion 5 whereupon a pivot pin or other suitable element 7 is engaged through the-tube,in

the manner as shownin the Figures-1 and 2;

this angularly bent part being formed" in a substantially right angularlydisposed and reduced finger 11- engaging in a-portion of the Way through the enlarged partg5 of the shaft 1, thus serving as a means for anchor; ing the leaf spring 8 a posit'ionWvhereat the free extremity thereof will engage vvith the adjacent inner side of the shaft 2 or .itsfll'iandle'portion 3; i a An adjusting or stop screw-12 is turned into 7 engagement with a screw-threaded. opening formed in the inner side of the shaft 2 in p'roximity't'o its pivotal connection With the shaft land the outer' end of this-screw is formed With a reduced and squared shank 13 so disposed as to be engaged;at times, with the adja cent'e'nd of the s'crevvl10 and to thereby liinit' the eXtent'of inward pivotal movement of the shafts 1 and 2. Y

Substantially complementally formed shape-d shanks 13 and ltare formed integral with the free extremities of the crossed and pivotally connectedportions of the "shafts 1 and 2; the shank 14- being formed,

adjacent its point of jointure" wvitl1 the flattened portion '6 of the shanka, With an "enlargement or shoulder 15', While each of said shanks are correspondingly curved upon throughout their respective lengths and also, have their cross sectional sides outwardly re'duced, that is, the shanks are, in a fashion, outwardly; tapered to the free extremities thereof; 'Upon-these free extreinit ies'bf the shanks-Band 14, correspondingly shaped inwardly extending and,

opposed legs 16 and 17 are formed, said legs, as Will be noted upon reference to the Figure 3, being ofiset from the longitudinal axis of Figure' these facesare arranged at slight angle with respect to the plane in whiclrthe shafts 1 and 2 are arranged. By this convexity of the outer: faces of the blades 16 and 17 t0gether with the angular positioning of .the same, it will be understood that during 1 usage thereof they will bedisposed away from th 'process-or'matter to be trimmed or cut and consequently thereupon, the edges of the process or matter cut or trimmed thereby will be left more obtuse and thus,

will promote a mor rapid healing.

Also, it IS to be noted that the inner-sides or faces of the shanks 13 and 14-, by reason of their tapered formation, willprovide therebetween an increasingly greater clear-- ance as they approach the inwardly disposed blades 16, so that .at-their respective points of jointure with said blades, they will permit of a] full or complete exposure of the upper sides of the blades and consequently thereupon, allow user of the tool a clear View of an operating field,'hence facilitating an accurate operation.

That rigidity and-strength maybe given J the blades 16 and 17 whereby-to partially insure an accurate meeting of the cutting edges of the same, said blades preferably taper from their respective points of jointure with-the shanks 13 and 14 as indicated at 18 and thus, with inward or opposed movement under pressure of the handles 3 and 4: ofqthe shafts 1 and 2 will be caused to effectually cut or sever the process or other matter engaged thereby due to the arrangement of the blades at substantially right angles to the said longitudinal axis of the instrument. 3

By reason of, the curvature of the shanks 13. and 14, whereby theopposed blades 16 and 17 are laterally offset from the longitudinal axis of the instrument, it will be appreciated that a user of the instrument would be enabled-to more readily and accurately engage the same in the mouth of a patient and as accurately reach the proc ess, gum tissue or other matter to be treated thereby. Also, due to the peculiar forma tion of the shanks 18 and 14 and the result-,

ant spacingof the inner sideof the same from each other, itwill be noted that a full and unobstructed view of the cutting or meeting edges of the blades will be afforded and hence, such operator will be permitted to have a full and unobstructed view of an operating field.

By properadjustment of the stop screw 12,

it will b understood that the cutting edges ofthe blades 16 and 17 may be caused to meet with the desired nicety or accuracy necessary inv a clean cutting of process or other matter engaged thereby and. furthermore, that by hunting the extent of inward movement of theseblades 16 and 17 through the .stop screw 12, that dulling of the cutting edges of said blades or the stressing of. the

same to sudden extent as tor bring about an imperfect. meeting or overlapping thereof will be positively prevented, thus enabling the tool to remain in a state or condition for eflicient usage.

In finishing the improved instrument, the

same may be polished to the desired extent and it is preferable that all cornersof said instruniients shall be rounded, especially at the hinge jointure between the shafts 1 and 2, wherebyto prevent pinching of the operators thumb or fingers when using pressure and similarly, to prevent "pinching ;or scratchmg of th hp of a patient or other tissue.

Manifestly, the construction shown is capable of considerable modification and such modifications as is within the scope of my claims,,I consider within the spirit of my invention.

Iclaim: I 1. An instrument of thel character described comprising pivotally 1 connected shafts, shanks carried on the same, the adjacent and. inner sides of said shanks being formed to effect theirrelative, spacing when in closed position, and opposed complemental mentally curvedinwardly disposed blades;

carried on the free ends of said shafts laterally offset from the longitudinal axis of the shafts; I i

In witness whereof I have hereunto setmy hand. i

GEORGE A. OSTERMEIER,

no I 

